Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate vulnerabilities

2 known vulnerabilities in Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate from Gen Digital. 2 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 8.8 High severity

  Avast Antivirus, Avast One, Avast Premium…: Unrestricted Upload of File with Dangerous Type

  CVE-2026-80302Nov 6, 2026Gen Digital

  Insufficient isolation in the Avast sandbox file virtualization layer on Windows allows a local, low-privileged attacker executing inside the sandbox to write arbitrary files outside sandbox containment and execute code on the host. The sandbox virtualizes fil

• 8.8 High severity

  Avast Antivirus, Avast One, Avast Premium…: Improper Handling of Insufficient Permissions or Privileges

  CVE-2026-80301Nov 6, 2026Gen Digital

  Improper isolation in the Avast sandbox on Windows allows a local, low-privileged attacker executing inside the sandbox to access COM interfaces to the Task Scheduler service, escape containment, and execute code with elevated privileges outside the sandbox. T